Like for instance:
By which you mean leaving your garage door partially open to let out the smoke from your cigarettes and leaving a purse hiding in the corner that no one can see from the street?
No, by which I mean Kaarma, after two break-ins, telling a witness he intended to kill an intruder in his house, then setting up motion detectors and video cameras in his garage, leaving a purse with "tagged" items inside (in order that they could be more easily traced in the event of a theft) in an open garage, then, when the motion detector triggered and it was clear from the video that someone was in the garage, proceeding out into the garage and firing four shotgun rounds at the intruder without calling out or doing anything to ascertain whether he posed a threat.
The Smith case, like this one, involved a homeowner who was appropriately upset after multiple break-ins, and who (less appropriately) created a situation in which it was highly likely a break-in would occur, then shot the intruders without warning, whether or not they posed a threat. I actually think the Smith case is more defensible than Kaarma's in that at least Smith's intruders had to break into the house in order to get killed. Kaarma essentially enticed his victim into his garage under circumstances in which (as was not true in the Smith case), there was a significant chance that the intruder would be innocent of any intent to commit a crime. Here, I see no reason to think that the victim would ever have posed any threat to Kaarma or his girlfriend whatsoever.
Setting aside the merits of Montana law (and personally I have no problem with the law as written), this seems to me like a fairly clear-cut case of intentional homicide, and in my view this is not acceptable behavior in any civilized society. I have no problem with a citizen killing someone in legitimate self defense, but I do have a problem with a citizen baiting a trap that is likely to ensnare not only people who would not otherwise commit a crime, and even people with no criminal intent at all, then killing anyone who stumbles into it. This isn't fucking Yemen. IMO he should be charged with first-degree murder, and the jury can determine whether they believe he acted in self-defense. If the girlfriend knew he intended to do this and facilitated it by lending him her purse, she should be charged with conspiracy to commit murder.